Officer Brinna Caruso has built a reputation in the precinct as the cop to call when a child goes missing. For Brinna, it's personal: she was one of them. She and Hero, her search and rescue dog, stop at nothing to find a missing child. Detective Jack O'Reilly isn't ready to return to his homicide duties after losing his wife to a drunk driver. When he's assigned as her partner, Brinna isn't sure she can rely on Jack. But when a man surfaces with an MO similar to the criminal who abducted Brinna, they must combine efforts to catch a kidnapper.